#include<bits/stdc++.h>
#define ll long long
using namespace std;

int read() {
    int t = 0, d = 1;
    char c = getchar();
    while(c>'9' || c <'0') {
        if(c == '-') d = -1;
        getchar();
    }
    while(c >= '0' && c <= '9') {
        t = t*10 + c-'0';
        c = getchar();
    }
    return t*d;
}

int main() {
    freopen("arena.in", "r", stdin);
    freopen("arena.out", "w", stdout);

    return 0;
}
